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|Exhibit 32.1
Certification of Chief Executive Officer Pursuant to Section 1350 of Chapter 63 ofTitle 18 Of The United States Code
I, J. Patrick Spainhour, the Chairman and Chief Executive Officer of The ServiceMaster Company, certify
that (i) the Quarterly Report on Form 10-Q for the quarter ended March 31, 2007, fully complies with
requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information
contained in such Form 10-Q fairly presents, in all material respects, the financial condition and
results of operations of The ServiceMaster Company.
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| | /s/ J. Patrick Spainhour            
| | ------------------------------------
| |                                     
| | J. Patrick Spainhour                
| | Chairman and Chief Executive Officer
| | May 10, 2007                        

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|A signed original of this written statement required by Section 906 has been provided to The ServiceMaster

Company and will be retained by The ServiceMaster Company and furnished to the Securities and Exchange

Commission or its staff upon request.

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